Valve seat grinder



April 30, 1935. T, D, ENE-rE l;9919,322

VALVE SEAT GRINDER April 30, 1935. r, D, ENETE VALVE SEAT @BINDER FiledNov. 2., 1934 3 Sheets-$11861'l 2 Inventor Attomey April 30, 1935. T. D.-ENETE VALVE SEAT GRINDER 3 Sheets-Sheet 5 Filed NOV. 2, 1954 Inventor,E Engg? v v Attorney Apr. 3o, i935 l 1,999,322

UNITED STATES PATENToFFlcE VALVE SEAT GRINDER Truman D. Enete,Janesville, La.

Application November 2, 1934, Serial No. 751,224 5 claims. (c1. 51-241)This invention relates to an improved valve In the drawings: seatgrinder and it has more particular reference Figure 1 is a view, partlyin section, and partly to an electric motor driven type utilizing an inelevation showing the complete assembly with abrading tool appropriatelyadapted to the par' the parts constructed in accordance with the 5ticular surface to be worked on, principles of the present invention andillustrat- 5 Briefly, the preferred embodiment of the ining the mannerin which it is used in conjunction vention includes an electric motorhaving a rowith a motor block.

tary abrading tool centrally arranged, and ad- Figure 2 iS 8 bOttOInPlan View Showing the iustable supporting means for said motorallowfeatures appearing on the base plate or disk of ing the motor to berevolved bodily around a the motor casing. 10 fixed axis so that thetool may travel in a circular Figure 3 is a horizontal sectional viewthrough path to provide the desired orbital motion and the lower portion0f the Structure illustrated in rotary grinding action and to therebyinsure Figure 1, the section being teken 0n the plane 0f positiveresults. the line 3 3 of Figure 1.

Needless to say, I am sufficiently cognizant of Figure 4 iS afragmentary detail view showing 15 similar prior art valve grinders toadmit that an the attaching lug Provided fOr Securing the electricallydriven grinder is not new. It fol- Special -tcOl reStin Placelows,therefore, that 1t is my primary purpose and Figure 5 is a view 0f thetool rest supporting aim to generally improve upon known valve postwhich serves as a relatively stationary pintle grinders of thisparticular type be they marketed and Divot meanS- 20 or patented and toaccomplish this through the Figure 6 iS e Perspective View 0f an adapterinstrumentality of a structure characterized by bracket fOr an implementclampnoteworthy improvements and refinements. Figure 'l iS anelevational View Showing the @ne structural feature and its accompanyingIne-nner in which the adapter bracket and tool advantage has to do witha turnable hollow Clamp are assembled t0 provide Stone dressing andspindle adjustably mounted on the base of the trlling meenS motor so asto permit it to be regulated with re- Figure 3 iS c detail Perspectiveassembly View spect to the associated pintle means to allow the Showingthe clamp and truing device or impleorbital path or movement of therotary abrading nienttool to be regulated according to the diameter ofFigure 9 iS a detail Sectional View 0f the ad- "o the seat being ground.luStable Clamp.

A further feature has to do with the provision Figure l0 iS e ViewSimilar t0 Figure 6 Showing oi a special tool rest or post whichincludes as e Slightly differently Shaped adapter fixture 0r r" one ofits features an adjustable pintle pin for bracket fer the clamp, thisparticular part being cooperation with the hollow spindle so as to al-Variable aCCUYdng tothe type 0f abladlng Stime o low the abrading tooland associated parts to be usedadjusted toward and from the valve seatsothat Figures 11 *md 12 are detail eleVatlOnl VleWS it may be properlybeveled as conditions require. 0f different types 0f @fading-150015 Afurther feature oi' the assemblage has to do Referring mst t0 Figure 1it Will be QbSeIl/'ed with the provision oi' interchangeable abradingthajt the numeral '3 designates aPQrtable light' 4U tools and anattaching and operating shaft there- Welght highfspeedmotor- This 1.5 0fappmp for which provides the desired range of adjustate type so far as1t relates to delivery and gen' ment believed to be practical for thepurposes Hamon Pf Current but preferably 1s m the fon.

45 desired within reasonable limits. ci a umversal type Iotor lsmc thtnqtor tls 45 o no consequence, mere y ca a en ion opautresattraitsreiterati.. gereserveerde fixture or bracket designed fordetachable mount- 'y' base plate I4 which is of disk-like form is promgon the base plate of the motor and provlded vided with a central bearingl to accommodate 50 with a umg or dressing implement for the pur* themotor shaft I6. The motor shaft extends 'r pose of conditioning theabradant element or through and beyond the cent1-a1 aperture in Stonethebase plate and is formed with a screw-thread- Other lectures andadvantages will beccme ed bore which serves as a socket to accommodatemore readily apparent from the following dethe screw-threaded shank l1of the abrading tool sorlption and drawings. ls. This tool includes abeveled portion w in 55 its shank to which the stone or abradant head 24is attached. It is to be pointed out that the abrading tool will vary inshape and proportions according to the particular taper to be placed onthe valve seat. For example, the types of tools shown in Figures 11 and12 are frequently employed and these are merely distinguished, as amatter of convenience, by the numerals 2i and 22. Flmdamentally,however, they are standardised and interchangeable with respect to thetool I3. Therefore, it will be observed that so far we have an electricmotor with a shaft I3 constructed to accommodate the interchangeabletools I3, 2l, and 22. In each instance the tool iscentrally arrangedwith respect to the base plate I4 and it is adapted for cooperation withthe beveled valve seat 23 in the motor block 24. The motor block shownis provided with the usualy cavity or recess 25 and valve stem guide 25.Advantage of this feature 25 is taken so as to use it in theaccommodation of a special supporting post unit denoted by the numeral21 in Figure 5. This post-unit may vary slightly and the one shown inFigure 5 is not exactly the same as the one shown in Figure 1.Fundamentally however, the post includes a cylindrical stem portion 23which serves as a pilot and which iits into the guide and supports thepost with the intermediate portion beveled as indicated at 23 and thisprovides a shoulder to prevent wobbling of the post when it is properlyseated in the guide 25. 'Ihe upper end portion 33 is formed with acentral screw-threaded socket to accommodate a pintle pin 3l which isthreaded into it. This pin serves as a pivot element and the adjacentportion 33 serves `as a journal around which the special tool rest 32turns. Thistool restisofspecialdesign.

In connection with the tool rest, I call attention mst to Figure 4wherein it will be observed that the numeral 33 designates a lughavinganendlessgrooveuformedinit. Thislug is formed integral on the baseplate I4 and located eccentrioslly with respect to the centralinedgrinding tool. The attaching neck 35 of the tool rest is constructed toaccommodate this lug, or rather, fits on this lug and is clamped firmlyin place by a tightening bolt or screw 35. 'Ihe stem of this rides inthe groove 34 allowing the entire part 32 as a unit to be turned foradjustment. The complementa] portion oi thetoolrest32isinthenatureofasleeve or v ranged tool rest vunit 3| which is itself adjustable,

it is possible to place the post unit 21 in the existing guide 23 and tothen slip the sleeve 31 down over the journal 35 to provide an effectiveturning support for the motor I3. Consequently, the abrading tool I3 canbe swung around in an orbital path sov that as it turns on its own axisit may travel in said path to uniformly sri-nd the seat 23 in an obviousmanner. The sensitivity of the grinding action can be controlled byraising and lowering the pintle 3i which is in a sense an adjustablepivot. In other words, the pressure can be regulated and by resorting toexperience plus trial and error, the

user of the device can soon adjust it for expeditious and satisfactorygrinding work.

In addition to the grinding means, it is to be observed that the baseplate is provided with a keeper seat or groove 33 and this is adapted toaccommodate the special adapter bracket of the type denoted by thenumerals 39 and 45, in Figures 6 and l0, respectively. 'I'hese bracketswill vary according to the types of tools or stones employed. In eachinstance, however, the bracket includes a shank 4I whereby it is slippedinto the seat 33 and fastened in place by a set screw -or the like. Inaddition, it includes a shaft portion 42 of rectangular form which isadapted to accommodate the slidable clamp 43. This clamp is constructedto accommodate a retaining screw 44 and a special adjustableconditioning implement 45. This implement 45 is provided with aso-called diamond point 45 which can be properly adjusted in relation tothe beveled surface of the grinding stone to resurface the stone or tootherwise dress and condition it for more satisfactory work. In otherwords, advantage is taken of the rotary stone feature to employ thisadapter anddressing means in association therewith to add to the rangeof utility of the invention as a whole.

It is evident that novelty ls predicated upon the centralisedinterchangeable abrading tool feature-which is electrically driven,together with the pivot-equipped post and special tool rest associatedtherewith. The tool rest is aninnovation in itself in that it iscccentrically mounted on the lug 33, and turnable around said lug so asto adjust the offset bearing sleeve and to there by regulate theposition of the stone and to change its orbital path according to thediameter of the valve seat being ground. All of these features have beencarefully selected and mechanically coordinated to provide theirproportionate share in developing a structure which, it is believed,transcends in importance and eiliciency electrically driven valvegrinders of similar types.

It is thought that persona skilled in the art to which the inventionrelates will be able to obtain a clear understanding of the inventionafter considering the description in connection with the drawings.Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in shape, sizeamirearrangement of details coming withinthe field of invention claimed may be resorted to in actual practice, ifdesired.

What is claimed is:

1. In a structure of the class described, a motor having a cover plateprovided with an eccentrically arranged outstanding lg having an endlessgroove, a tool rest including a casting having a neck forming a socketfor reception of said lug, said neck being provided with a clampingscrew cooperable with said groove, said tool rest also including alongitudinally elongated laterally offset sleeve forming a bearing forthe accommodation of a supporting post of the type described.

2. In a structure of the class described a motor having a cover plateprovided with an eccentrically arranged outstanding lug, a tool-restincluding a casting having a neck forming a socket for reception of saidlug, coacting means between the lug and neck enabling said tool rest tobe turned on its axis and retained in a predetermined set position withrespect to the cover plate, said tool rest also including alongitudinally elongated offset sleeve constituting a bearing.v and arelatively stationary support including a post having adjustable meansfor reception in said bearing.

3. As a new article of manufacture, a component part of a valve grindingassemblage of the class described comprising a single casting having aneck forming a socket for reception of a complemental attaching lug,said neck being provided with a split portion carrying an adjusting andretaining screw and also including an elongated laterally oise't sleeveforming a bearing for the accommodation oi' a supporting post of thetype described.

4. A valve seat grinder assembly o! the class described comprising anelectric motor formed at its'working end with a centralized motor drivenabrading tool, and further provided at the same end with anYeccentrically arranged stationary attaching lug, a tool rest having aportion rotatably and detachably clampedfto said lug, said tool restincluding a longitudinally'oiset elongated sleeve portion constituting abearing; said bearing extending in approximate parallelism with saidabrading tool and projecting beyond the tool,

a supporting post including a stem portion designed to fit in anexisting guide passage in a complementa] motor block, the upper endpor-v stem serving as a. pilot for reception'in an exist.

ing guide passage in a conventionall motor block, the intermediateportion ot said body being tapered and the upper or remaining portionbeing fashioned to provide a cylindrical journal and,

being formed with a central screw threaded bore. a threaded end beingadjustable in said bore. 4the upper end of said pin having the functionoi! a pivot pintle, an electric motor provided with a centralized motordriven abrading tool, provided alongside of said tool and eccentricallythereto with a nxed attaching lug. a tool rest rotatablf'm anddetachablyclamped on 'said lug and includ- 'mman n. zum

